Split the commands and change the naming.
* Tracking a repo is now called "seeding"
* Tracking a peer is now called "following"
In this commit, we don't change most of the internal code, only the
user-facing part.
This change allows users to track/untrack peers and repos without a
running node. This fixes a bug when running `rad init` without the node
running, where the repo would be tracked with a different scope than
what was specified on the CLI.
It didn't make sense to get eg. `Patch failed` when listing patches
failed. We change all fatal errors to simply "Error:", giving more
control over the individual commands.
cloudhead